Well it seems there are some merge conflicts, read about this here and how to solve them: https://docs.mendix.com/refguide/using-version-control-in-studio-pro#6-1-resolving-a-document-conflict
The empty caption errrors are quite easy to fix. It means that there are missing captions for the default language. Just double click on them and fill in a caption.
Updating your Mendix app can lead to errors in the modeler, which you'll have to solve first.
Also, when working with multiple people in the same development line, you can have conflicts when someone has changed for example a microflow that you have also changed. The conflicts have to solved as well. See for example https://www.mendix.com/blog/resolving-commit-conflicts/
In your specific case, the errors are mostly caused by empty labels in the AppCloudServices module. I would suggest resolving your conflicts first, and then updating the module from the App Store: https://appstore.home.mendix.com/link/app/934/Mendix/AppCloudServices